Insulated metal barrel



My 27, 1941. R MADDOCK '2,243,164

INSULATED METAL BARREL originalfiied Nov, 27, 1955 lul Z4 5 5o 5 aPatented May 27, 1941 INSULATED METAL BARREL Robert H. Maddock,(lleveland, Ohio, assignor to The Midland Steel Products Company,Cleveland, Ohio, a corporation of Ohio Original application November 27,1933, Serial No. 699,821, now Patent No. 2,080,326, dated May 11, 1937.Divided and this application February 6, 1937, iSerial No. 124,433

7 Claims.

This invention relates to new and useful improvements in insulated metalbarrels and is a division of my co-pending application Serial No.699,821 led November 27, 1933, and which matured into Patent 2,080,326granted May 11, 1937.

An important object of the invention is to form only the bung side ofthe inner shell with a bilge to facilitate complete drainage of thecontainer and to provide a bung structure which does not interfere withthe ready assembly of the inner and outer shells.

A further object of the invention is to provide a special form of tapbush plate which is associated with the heads of the inner and outershells in a manner to relieve the weld between the tap bush and innershell from excessive stresses tending to weaken the welded joints.

A still further object of the invention is to provide the outer shellwith integral rolling rings or hoops pressed out of the metal itself andto increase the section modulus of such ribs with means which areentirely free of all contact with the insulated inner shell in a mannertoprevent denting of the outer shell from distorting the in-v ner shell.

Still another object of the invention is to provide the rolling rings orribs with shock absorbing adjuncts which add materially to the long lifeof the barrel under the most adverse handling conditions.

Other objects and advantages of the invention will become apparentduring the course of the following description.

In the accompanying drawing forming a part of the description andwherein like parts throughout the several views are referred to withcorresponding numerals.

Fig. 1 is a side elevation of the improved barrel.

Fig. 2 is a longitudinal section of the same,

Fig. 3 is a top plan of the barrel,

Fig. 4 is an enlarged fragmentary longitudinal section showing amodif-led construction,

Fig. 5 is a modified form of tap,

Fig. 6 is a section of another modified form of tap,

Fig. 7 is an enlarged section illustrating the application of one formof shock absorbing rings applied to the rolling ribs,

Fig. 8 is a modified form of the same,

Fig. 9 is a further modified form of the shock absorbing rolling ring.

Referring now to the drawing for various details, the numeral I0designates an outer bilged shell of mild steel or other suitable metalhaving a bung hole II at the middle of one of its sides and upon eachside of which in the bilged portion are formed a pair of outwardlypressed integral annular ribs I2 and I 3, the two innermost ribs I3, dueto the bilge of the barrel, having the greater circumference andconsequently forming the two rings upon which the barrel is rolled intransportation. This outer shell is preferably formed from a flat sheetof metal rolled into a cylinder with its two longitudinal edgesjuxtaposed for welding with a longitudinal seam opposite the side inwhich the bung is provided. This cylindrical shell is then bilged andthe ribs I2 and I3 are formed therein.

In Fig. 2 it will be noted that the ends of the outer shell in thecompleted barrel are rolled into beads I4, but it is to be understoodthat this is the nal assembly step in the construction of thel barreland before the inner shell I5 is placed therein. The chime portions ofthe outer shell I0 are of true cylindrical form or substantially so inview of a purpose which will presently appear.

To protect the outer as well `as the inner shell against distortion dueto the impact of the barrel with other objects, reinforcing rings I 6 ofsubstantially channel shape cross section are tted and spot welded atspaced intervals as indicated by the numeral I 'I to the bottom of thetwo central rolling ribs I3 with the flanges of these reinforcing ringsextending inwardly as shown in Fig. 2 to increase the section modulus ofthe ribs I3. These reinforcing rings are not necessarily continuoushoops or rings but may be so if desired.

The inner shell I5 of the insulated barrel may be constructed of steelhaving its interior suitably pitched or may be composed of metal whichrequires no pitching such as stainless steel, aluminum, Monel metal orany other material which is non-oxidizing and which will not contaminatethe contents of the barrel.' This inner shell I5 is also formed from anat blank rolled into a cylinder and welded along a longitudinal linelengthwise of thev barrel and provided near each end with an inwardlyextending annular bead I8. The longitudinal half I9 of the inner shellcarryingthe bung 20 is bilged and this bilge merges into the otherlongitudinal half of the inner shell which is substantially cylindricalas best appreciated from Fig. 2 of the drawing. 'Ihis constructionprovides for the complete drainage of the barrel. From this figure itwill also be apparent that the ends or chimes of the inner shelldesignated by the numeral 2| beyond the beads I8 are perfectlycylindrical and do not contact in the slightest degree with any part ofthe outer shell or `the end headsthereof. The bung 20 as shown is a dropforging-and on its under side is grooved for the reception of theoutwardly flared edges of the bung hole II which are weldedcircumferentially to the bung as at 22. This bung 20 is much larger thanthe bung hole and is further spot welded as at 20 at several places nearits outer margin to the inner shell to transmit stress from the outershell to the inner at points remote from the circumferential weld.

The two ends or heads 23 and 24 of the inner shell are outwardly disheddiscs of the same material as the shell I and are each provided with asurrounding annular axially extending flange 26, the circumference ofwhich is slightly less than the circumference of the inner surface ofthe chime portion of the outer shell. The heads 23 and 24 are slippedinto the ends of the inner shell as far as they will go and against thebeads I8 which limit their inward movement. The anges 25 are thencircumferentially seam welded to the cylindrical chime portions of theinner shell to form aliquid tight container, the inner surfaces of whichare suitably pitched if the shell is constructed of material which willoxidize. One of the heads, as best seen'in Fig. 2 is provided with a topopening 21 through which the reduced end of a tap bush 28 is extendedand welded at 10 on the inside of the head. This reduced portion of thebush 28 also extends through an opening in a tap bush plate 29 so thatthe annular shoulder of the bush overlaps the margin of this openingwhich is provided in the depressed central portion of the plate 29 toprovide suicient clearance between the upper end of the bush and thewalls of cavity 30 in the tap bush plate to receive the margin of theopening in this plate as shown. This plate is provided with inclinedportions 60 to position its surrounding marginal portions 32 against thehead 24 to be welded thereto as at 32' at points remote from the weld 10of the tap to relievev the vsanne of stress.

The end heads 3l and 32 for the outer shell are dished outwardlyconcentrically with the inner heads so as to be spaced apart throughouttheir entire area. The top outer head 3l is provided with an aperture 33the margins of vwhich rest upon the bridge portion 34`of the tap bushplate to be welded at its margin as indicated by the numeral 35. Bothouter heads 3| and 32' are otherwise similar in construction and each isprovided with a stepped or Z-shaped flange 36 which includes an annularaxially extending flange por-V tion 31 substantially normal to the planeof the head, an intermediate radial portion 38 normal to the portion 31and extending laterally to meet the chime portion of the outer shellwith a portion 6I substantially parallel to the portion 31. The radially'extending flanges 26 of the inner heads 23 and 24 engage the portion-38 of the outer heads to thereby completely suspend or support theinner shell within the outer one with insulating space completelysurrounding the inner shell I5 land both of its heads. This insulatingspace may be lled with suitable insulating material 8B, but preferablyin the form of seaweed enclosed in paper envelopes BI wrapped around theinner shell I5 `and interposed between the heads of the inner and outershell.

The'outer portions 6I of flanges 36 closely contact with the innersurfaces of the chimes of the outer shelland are seam welded as at 39thereto so that the insulating space between the shells is a dead airspace and sunicient of itself to provide ample insulation for the innershell. The ange portions 6I of the outer heads of Fig. 2 do not extendlalong the ends of the outer shell as far as the corresponding portions6I shown in Fig. 4, but in either event the ends of the flange portions6! are enclosed by rolling the extreme ends of the outer shell intobeads I4 in Fig. 2, or I4 as shown in Fig. 4. In the latter, the flangeportion 6| is of suflicient length to be rolled into a complete bead 40within the bead I4 of the outer shell. Besides strengthening the ends ofthe barrel, this bead forms a convenient hand grip at any point aroundthe circumference of either end of the barrel to facilitate handling andlifting thereof.

In assembling the inner and outer shells, the outer head 32 or 3| may befixed in one end of the outer shell and then the inner shell with itstwo heads 23 and 24 welded thereto is slipped into the outer shell withthe radially extending flanges 25 of the inner ends having only slightclearance with the chime portions of the outer shell. This service inlocating the inner shell substantially concentric with the outer onewhich of course facilitates placement of the outer heads 3l and 32 sothat the axial portions 31 slip inside of the axially extending flanges25 to completely support the inner shell while bringing their radialportions 38 into seating engagement with the radial flange 26. After theouter heads are positioned, they are circumferentially seam welded as at39 previously described after which the ends of the outer shell arerolled into the beads heretofore described. The edges of the bung holeII may be welded as at 4! to the outer surface of the bung 20 asillustrated in Fig. 2 before or after the heads are assembled. When thiswelding is done before the flanges of the outer heads are welded to theouter shell, this connection of the two shells serves in locating theinner shell centrally of the outer shell. In case insulating material isused between thel shells, it can be wrapped around the inner shell priorto its assembly in the outer shell and the lateral flanges 26 preventthe insulation from being dragged off of the inner shell with itssliding contact with the outer shell. It will be noted in Fig. 4 thatthe inner shell I5 is devoid of any head locating beads IS since in thismodification the radially extending ange 26 of each head will abut theend of the inner shell to limit movement of the head inwardly of theshell to thereby accurately position it and determine the capacity ofthe barrel.

Figs. '7 to 9 inclusive show various modifications of shock absorbingrings applied to the two central rolling ribs i3. Fig. 7 discloses acontinuous at elastic rubber band 42 which when stretched over rib I3conforms to the contour thereof and is retained in position by theinherent resiliency of the band. In Fig. 8, a ilexible band 43 of anysuitable material, but preferably possessing elasticity and ofsemi-circular cross section, is vulcanized to a substantially flat metalband 44 which in turn may be welded to the exterior of the rolling ribI3. In Fig. 9, the rolling ribs located as are the ribs I 3, are formedwith an exterior arcuate seat 45 on opposite sides of which areoutwardly converging surfaces 46 of the rilb whereby a continuousiiexibleV ring 41 preferably of circular cross section and possessinginherent resilience is applied to the rib by rolling the saine along thebarrel and up an in` clined wall to seat in the arcuate seat 45 of therib, where it may be, if desired, cemented or vulcanized in place. Inthis form of rolling rib 46, the inner channel shaped reinforcing ring48 is of corresponding cross section to t the contour of the integralrib 46 and is spot welded thereto.

In Fig. 6 is shown a modied form of tap plate and tap bush which is thesame as the bush 28 heretofore described with the exception that thebottom 2S of the depression 33 is welded as at 29 in any suitable manneraround the edges of the opening 21 in the inner head 24. Furthermore, agasket 50 is placed in the bottom of the cavity 30 for liquid tightsealing engagement with the bottom of the tap E8 which is provided witha concentric annular threaded flange l for screw threaded engagementwith threads provided on the side walls of the depression. In thismanner the tap bush 28 can be readily renewed if and when required.

In Fig. 5 a modification of the foregoing type of tap bush and plate isillustrated which is useful when the inner shell and heads are made fromnon-oxidizable material and the inner head 24 is formed with a flangedtap opening for projection through the tap opening in the bush plate tobe bent down and around the edges thereof as indicated at 52. Thisdispenses with the necessity of a welded joint at this point, since apliable rubber gasket 53 may be squeezed down upon this flange tooverlap the same and fill the cavity by means of the pressure exerted byscrewing the tap bush 28 into the cavity of the tap plate.

From the foregoing it will be seen that the radial flanges 2S of theinner shell perform many functions. First they serve in locating theinner shell concentrically within and spaced from the outer shell.Secondly they form footing on the radial portions 3B of the outer headsto resist movement of the inner shell. Insulation 90, Fig. 4 may lbedisposed between these portions 31 and S8 and the iianges 2S to furtherinsulate the inner shell from the outer one. Thirdly, the flanges 26form conning means for insulation 86 to prevent it from wrinkling orvbeingpulled off of the inner shell when being inserted with the latterinto the outer shell. Fourthly, they add much strength to the ends ofthe inner shell. Fifth, they limit telescoping of the outer heads intothe inner heads and the inner heads into the inner shell and therebydetermine the capacity of the inner shell and x the spacing of the outerheads from the inner heads. By reason of the ends Gi of the flanges ofthe outer heads being enclosed Within the heads I4 and I4', stressdirected toward the seam Welds 39 from impact is absorbed by the beads.

It will of course be understood that various changes in the shape andarrangement of parts may be resorted to Without departing from the scopeof the appended claims.

I claim:

l. A double walled barrel comprising spaced inner and outer walls,having concentric tap openings, a tap bush plate having a depressedportion with an opening registering with the opening in the inner walland bridging the space between the walls, said plate being Welded to theinner wall around the opening therein, and said plate having its marginssloping from the outer wall to the inner one and welded to the latter atpoints remote from the Weld around the opening to relieve the same ofstress.

2. A double wall barrel comprising spaced inner and outer walls havingconcentric tap openings, a tap bush plate having a depressed portionwith an opening registering with the opening in the inner wall andbridging the space between the walls, a tap bush disposed in saiddepression with one end extending through the tap opening in the bushplate and welded to the inner wall and also having the other endextended through and welded to the outer wall and the bush plate, saidplate having a portion thereof sloping from the outer wall to the innerWall and Cil Welded to the latter at points remote from the weld aroundthe opening to relieve the same of stress.

3. A double wall barrel comprising an inner wall having a tap opening,an outer wall having a concentric tap opening, a tap bush plate having adepressed central portion enveloped by a iiange of the inner Wallextending through the tap opening in the plate and bent over the top ofthe depressed portion and said plate having a raised central portionabutting and welded to the outer wall and having an edge portion slopingfrom the raised central portion to the inner wall and welded thereto.

4. As an article of manufacture, a threaded bung bushing and a threadedbung bush plate for a double walled barrel, having spaced inner andouter walls, said plate being of sheet metal and having a centraldepressed portion with a tap opening to abut the inner Wall around thesaid tap opening and a raised central portion abutting the outer walland inclined to the inner wall, and said plate having the side Walls ofthe said depressed central portion threaded to receive a tap bung bush.

5. A double walled barrel comprising an outer wall having a tap opening,an inner wall with a concentric tap opening surrounded by a circulardepressed portion of the wall, a tap bush plate consisting of a bodyhaving a marginal portion welded to the inner wall, said body having anannular raised part, the upper surface of which is Welded to the insideof the outer wall, and said body having a central depressed perforatedpart abutting and welded to the depressed portion in the inner wall withits opening concentric with the opening in the inner wall.

8. A double walled barrel comprising an outer Wall having a tap opening,an inner wall with a concentric tap opening surrounded by a circulardepressed portion of the wall, a tap bush plate consisting of a bodyhaving a marginal portion welded to the inner wall, said body having anannular raised part, the upper surface of which is Welded to the insideof the outer wall, said body having a central depressed perforated partabutting the depressed portion in the inner wall, said central depressedportion being enveloped by a portion of the inner Wall projectingthrough the perforation in the plate and then bent around the edge ofsaid perforation and said body having the inside of its vertical wallsthreaded.

7. A double walled barrel comprising an outer wall having a tap opening,an inner wall having a concentric tap opening surrounded by a circulardepressed portion of the wall, a tap bung bush plate consisting of abody having a marginal portion Welded to the inner wall, said bodyhaving an annular raised part the upper surface of which is Welded tothe inside of the outer Wall, and said body having a central depressedperforated part abutting and welded to the depressed portion in theinner Wall with its opening concentric with the opening in the innerwall, a tap bung bush disposed in said depression having one end reducedto form a shoulder and to project through the bush` plate to be weldedto the inner wall around the opening therein, and shoulder adapted toabut `the surface of the bush plate, and said bung having its other endprojecting thlOUgh the Opening in the outer Wall and welded thereto.

ROBERT H. MADDOCK.

